How can someone without any shread of humanity possibly save it? FWIW if SEELE had made a special arrangement with Gendo that allowed him to see Yui again, I believe he would've done whatever they wanted; no questions asked. Hell, I say he would've entered into a contract with the angels if he felt it could get him closer to realizing his goals. Apparently, the rest of humanity can go suck it. As far as he's concerned, it's every man for himself, or at least that seems to be the ideological position he adopted fifteen years ago while abandoning everyone to their fates in Antarctica and escaping just in time to save his own ass.
Funny, it was SEELE who actually made a contract with an Angel to further their goals and actually set up most of the deaths we see. Gendo really just lets it happen at most, he's not really CULPABLE, so much as guilty by lack of action, which is completely different and possessing of entirely different ethical implications.
Now here's what I don't see. The supposedly wonderful individual (teacher?) that Gendo decided was responsible enough to take care of his kid. I mean, where is he? Had the guy even shown up yet or did Shinji have to wait there for hours on his own until somebody finally claimed him (maybe that's the basis of the playground sequence from EoE)? I would expect most toddlers that age have an adult guardian either holding their hand or standing nearby to make sure the kid doesn't accidentally make contact with the third rail or get into some other kind of trouble, but that doesn't seem to be the case here.
Shinji appears to have ridden the train by himself. Why, we can't say; I've entertained the notion that the teacher may not have been informed of Shinji's coming, or he did know, but didn't know he'd be arriving unaccompanied.
Whoever was supposed to be looking after Shinji during his childhood might have done an adequate job. Then again, years later when Gendo finally realizes that he has a use for his son, nobody accompanies Shinji on his journey to Tokyo III. He's just put on a train and sent into a warzone with zero supervision. From the time he arrives until the end of the series, his former caretaker never even tries to contact him to see how he's doing. When Shinji moves into Misato's apartment, we don't see him unpack any pictures of his former guardian or other keepsakes from where he used to live. Shinji never really discusses his former family life much (we don't even get a glimpse of it during his introspective sequences when he's reviewing his experiences). What I'm suggesting is that maybe this teacher Gendo selected was rather indifferent toward Shinji (perhaps it partially explains why he feels so worthless and alone), but in the end it made no difference to Gendo, since he was just as uninvolved.
Shinji does offhandedly comment that his legal guardian was kind to him, but they never really connected. Also, he has no relevance to current events, so he got shafted in the depiction department.
Originally, when Shinji agreed to pilot for NERV, Gendo assigned him to live in an apartment by himself, just like Rei. Even though Shinji ends up moving in with Misato, who quickly assumes the role of his guardian, Gendo was quite content leaving him to twist in the wind, all alone in a new city where he doesn't know anybody. To all the people claiming that Gendo abandoned Shinji because he was doing what was best for his son or that he was concerned for his safety, whenever I take a look at the Commander's track record, I cannot agree.
With someone with as poor social skills as Gendo, he might literally not realize anything wrong with this decision, especially since he knows nothing of Shinji's personality. "Um...shit, what to do with him? He's not staying with me, he'd refuse anyway. Um. Rei does pretty fantastically by herself. I guess Shinji could adapt too. Oh, Misato's going to take him? Fuck, yo, I didn't even know she liked kids. Fine, go for it."
If Gendo is so concerned about Shinji's safety, why does he want him going into battle against angels in the first place?
Oh, come the fuck on. This is a loaded keg if I ever saw one. Shinji has to fight because no one else can. Units 00 and 01 are the only active Evangelions NERV has access to. What the fuck are they supposed to do, wait the several months for Unit 02 to finish construction and shipping while Sachiel's having his way with Tokyo-3?
People seem to act like Gendo has an alternative option to every unlikable decision he makes. He doesn't.
Why didn't he do everything in his power to get other Evas/pilots on the roster before calling on his son at the last minute (even though he has an entire classroom full of potential candidates that he doesn't tap into until episode 17)?
None of them are Yui's children.
Why not at least contact him sooner so he could get some training before going into battle?
They were kind of caught by surprise.
What about asking his Section 2 agents to do more than just sit back and watch when Shinji gets his ass kicked at school?
Yea, and then Shinji (and the fans) would complain that Shinji is kept lonely and isolated because he's surrounded by bodyguard goons intimidating anyone from making friends with him. Fucking seriously.
I think it's made clear on several occasions that Gendo can't be bothered to care about anything other than himself. He ran away from Shinji because the kid represents everything that terrifies him; depression, loneliness, obligation and morality. All the stuff he didn't want to be inconvenienced to have to consider. He's not interested in protecting the world. He just wants to protect his precious scenario and if he has to sacrifice his kid or anyone else to achieve his endgame, he won't hesitate to give the order.
I don't know, he seems to give a hell of a lot of shit for Rei, though his reasons are debatable. And on atleast two occasions makes some effort to be a little nice to the kid, and both times don't go well. Though it doesn't excuse it, form Gendo's perspective I figure he thinks "Well, Shinji doesn't want me anyway, so why should I waste my time? I'm busy."